Mar 7, 1876: Alexander Graham Bell received a patent for the telephone.

Mar 7, 1965: Peaceful civil rights demonstrators marching from Selma, Ala., are brutally attacked with billy clubs and tear gas by police on the Edmund Pettus Bridge. The event is later called “Bloody Sunday.”

Mar 7, 1936: Adolf Hitler broke the Treaty of Versailles and the Locarno Pact when he ordered troops to march into the Rhineland.